Germans credited a shared victory to only one pilot, while the French credited full victory to all participants. British, Finnish and US air forces credited fractional shares of aerial victories, resulting in fractions, such as 11½, which might be for example 10 aircraft and three shares with the second pilot. Some U.S. commands also credited aircraft destroyed on the ground. The Soviets counted only solo kills, while group kills were counted separately, as did the Japanese. Probable kills are usually left out of the list.
Here it says that - "Luftwaffe continued the tradition of "One Pilot, One Kill".
It depends on what you mean. The Abschuss (killing blow) was only awarded to one pilot, as this was used for intelligence purposes and so on to track the war stats. The pilots, however, were given awards and so on on a victory point system, and could get points for a killing blow, a final destruction, or a separation. The number of points awarded for each of these also depended on what was killed, in what circumstances, with what help, and so on. So, for accounting how many planes were brought down they used an accurate (probably the most accurate) kill system; for awarding ace status, medals and so on, they used an even more abstracted system than most.
Germany fought and took down how many 2nd rate airforces before the majors got really involved AND got airforces up to speed? Poland, Belgium, Netherlands, Denmark, Norway, perhaps France could be included..
The Luftwaffe got trashed over the Netherlands. I think Poland did pretty well against them too, not so sure about the others.